> To my
>
> >> Panic! ...
> >> #define C CRP
> >> data R a = CRP a
> >> f (C x) = x
> >> f' (C x) = x
> >>
> >> f compiles and f' do not!
>
>
> Simon Marlow writes
[ a lot of rubbish ]
>
> I am sorry for confusion.
> ghc does not panic. And, probably, compiles right (?).
> This is me who panics.
> Because i do not know how to use #define directive in the programs
> that contain the names like f', f'gh, ...
>
> For i expected above cpp to replace C with CRP before compilation.
> And it cannot do this due to (') usage - right?
>
> It looks like cpp expects (') to be closed by another ('), otherwise
> it is a cpp error.
I misunderstood the problem. This should work:
#define C CRP
data R a = CRP a
f (C x) = x
f'{-'-} (C x) = x
I often have to do this sort of thing so that emacs gets the colors right
:-)
Cheers
--
Simon Marlow
Microsoft Research Ltd., Cambridge, U.K.
